EP0426522A1 - Structure multicouche pour le conditionnement de produits sensibles à l'oxygène - Google Patents

Structure multicouche pour le conditionnement de produits sensibles à l'oxygène Download PDF

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Publication number
EP0426522A1
EP0426522A1 EP90402902A EP90402902A EP0426522A1 EP 0426522 A1 EP0426522 A1 EP 0426522A1 EP 90402902 A EP90402902 A EP 90402902A EP 90402902 A EP90402902 A EP 90402902A EP 0426522 A1 EP0426522 A1 EP 0426522A1
Authority
EP
European Patent Office
Prior art keywords
layer
multilayer structure
oxygen
evoh
structure according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP90402902A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jean-Louis Flork
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ono SA
Original Assignee
Ono SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ono SA filed Critical Ono SA
Publication of EP0426522A1 publication Critical patent/EP0426522A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7246—Water vapor barrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00—Polyalkenes
    • B32B2323/10—Polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging

Definitions

  • the present invention relates to a polymer multilayer structure for the packaging of oxygen-sensitive products such as food, pharmaceutical products.
  • the invention applies in particular to structures comprising an oxygen barrier polymer layer intended to protect the oxygen-sensitive product throughout the entire life of the packaging.
  • the polymers commonly used to provide this oxygen barrier in particular polyvinyl alcohols (PVOH) and copolymers of vinyl alcohol and ethylene (EVOH) are sensitive to moisture, they are protected by layers moisture barriers, in particular polyolefins or polyvinyl chloride, generally by means of adhesive layers (GB-A-1 384 791).
  • these protective layers do not completely prevent the passage of moisture in the case of storage in humid air and especially of sterilization, which results in the loss of the properties of the oxygen barrier layer such as EVOH as the relative humidity argues.
  • the present invention makes it possible to reduce the effect of this loss of impermeability to oxygen during the life of the packaging by positioning the moisture-sensitive layer so that it is at the lowest possible relative humidity level. and as soon as possible from the birth of the packaging.
  • the solution according to the invention consists in placing the oxygen barrier layer outside the multilayer structure, in particular on the external wall of the packaging in the case where the conditioned product contains water.
  • the subject of the invention is therefore a multilayer structure for the packaging of oxygen-sensitive products, in particular foodstuffs, comprising a layer of polymer barrier to humidity and a layer of polymer barrier to oxygen, the permeability of which oxygen is a function of humidity, the two layers possibly being linked by an adhesive layer, characterized in that the layer of polymer barrier to oxygen is outside the structure.
  • the invention is particularly interesting in the case where the "oxygen barrier" layer is based on EVOH, or consists of EVOH.
  • the “moisture barrier” layer may in particular be made of a polyolefin, or any other polymer usually used in food, pharmaceutical or medical packaging, in particular a coextrudable polymer.
  • the multilayer structure according to the invention may comprise two or more of two successive oxygen barrier layers, in particular EVOH, optionally linked by adhesive layers.
  • a / adhesive / EVOH / adhesive / B where A, B and the adhesives are moisture barrier polymers to protect the EVOH from moisture
  • the invention consists in having the structure: A / adhesive / EVOH A being the moisture barrier polymer, in particular a polyolefin, for example polypropylene, which is in contact with the packaged product when the latter contains water, which is in particular the case for most foods (their relative humidity varying from 60 to 100%). In this case the EVOH is in contact with the ambient air which is at a lower level of humidity.
  • the humidity of the EVOH - therefore its performance as an oxygen barrier - is such that it is between the humidity of the food and the humidity of the ambient air, but always higher than the humidity of the air.
  • the multilayer structure according to the invention can be produced in a known manner, in particular by coextrusion of the polymers which form each of the layers (for example by flat die), by extrusion blow molding, by injection blow molding, etc.
  • a multilayer PP / adhesive / EVOH structure is produced by extrusion in the form of a rigid sheet 1.2 mm thick having the following composition: layer thickness PP (transparent homopolymer from Amoco) .... 4% 48 ⁇ m PP (same, with + 5% of white pigment TiO2) .... 90.5% 1086 ⁇ m Grafted homopolymer PP adhesive (Bynel R from the company Du Pont de Nemours) .... 2.5% 30 ⁇ m EVOH (Selar R from Du Pont de Nemours) .... 3% 36 ⁇ m
  • Trays (138mm X 138mm x 33mm, weight about 20g) are produced with this sheet by thermoforming using an RDM37.10 machine from the company ILLIG.
  • the trays are filled with cold water and then provided with non-peelable lids (in Alu / lacquer), and they are sealed at 220 ° C for 2s. at 6 bars (0.6 MPa).
  • the trays are placed in an autoclave and kept there at 121 ° C for 30 min with a back pressure of 2 bars (0.2 MPa), then re cools by injecting cold water into the autoclave. Then they are stored at 23 ° C and 50% relative humidity (RH).
  • the trays are opened after a period of 1 to 30 days after the sterilization step and a measurement is made of the permeability of the tray at each opening.
  • the oxygen permeability is measured with an Oxtran type device according to standard ASTM D 3985, at 30 ° C and 65-70% RH.
  • a permeability of 0.022 cm3 O2 / 24 h after 1 day, 0.023 cm3 O2 / 24 h after 7 days and 0.018 cm3 O2 / 24 h after 28 days was measured.
  • the invention applies to multilayer structures comprising at least one layer of EVOH or any similar oxygen barrier product and sensitive to moisture, and at least one layer of another extrudable polymer such as polyethylene, polypropylene, polystyrene, polyethylene terephthalate (PET), polyvinyl chloride (PCV), polycarbonate (PC), etc.
  • another extrudable polymer such as polyethylene, polypropylene, polystyrene, polyethylene terephthalate (PET), polyvinyl chloride (PCV), polycarbonate (PC), etc.
  • the oxygen barrier efficiency of the EVOH located in the outer layer can be reinforced or secured by one or more additional EVOH layers, for example a structure of the type: PP / Adhesive / EVOH / Adhesive / EVOH.
  • the EVOH in the external position brings the following other advantages: - an antistatic effect - a shiny appearance - easier control of its presence (its absence by a possible scratch could be revealed by a coloring of the adhesive).
  • the multilayer structure according to the invention in rigid or semi-rigid form, can be advantageously used for the manufacture of various containers such as trays, pots, tubes, in particular sealable.

Landscapes

  • Laminated Bodies (AREA)
  • Packages (AREA)
  • Wrappers (AREA)
EP90402902A 1989-10-31 1990-10-16 Structure multicouche pour le conditionnement de produits sensibles à l'oxygène Withdrawn EP0426522A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8914296 1989-10-31
FR8914296A FR2653756B1 (fr) 1989-10-31 1989-10-31 Structure multicouche pour le conditionnement de produits sensibles a oxygene.

Publications (1)

Publication Number Publication Date
EP0426522A1 true EP0426522A1 (fr) 1991-05-08

Family

ID=9386977

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90402902A Withdrawn EP0426522A1 (fr) 1989-10-31 1990-10-16 Structure multicouche pour le conditionnement de produits sensibles à l'oxygène

Country Status (11)

Country Link
EP (1) EP0426522A1 (ja)
JP (1) JPH03183544A (ja)
AU (1) AU642917B2 (ja)
BR (1) BR9005508A (ja)
CA (1) CA2028393A1 (ja)
CS (1) CS535590A3 (ja)
FR (1) FR2653756B1 (ja)
HU (1) HUT61928A (ja)
NZ (1) NZ235866A (ja)
PL (1) PL287575A1 (ja)
YU (1) YU203690A (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0549431A1 (fr) * 1991-12-27 1993-06-30 C.M.B. Flexible Film complexe, notamment destiné à l'emballage de produits alimentaires et le procédé de fabrication
FR2745788A1 (fr) * 1996-03-11 1997-09-12 Oreal Emballages proteges par des supports d'inscription barrieres

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0853162A (ja) * 1994-08-11 1996-02-27 Kurita Seizosho:Kk イオン交換樹脂用包装材
CZ2010472A3 (cs) * 2010-06-15 2011-08-10 Ústav anorganické chemie AV CR, v.v.i. Kombinovaný materiál na bázi polymeru obsahující nanocástice a zpusob jeho prípravy

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2182164A1 (ja) * 1972-04-28 1973-12-07 Grace W R Ltd
FR2302933A1 (fr) * 1975-03-03 1976-10-01 Toyo Seikan Kaisha Ltd Matiere d'emballage
FR2361223A1 (fr) * 1976-08-10 1978-03-10 Toyo Seikan Kaisha Ltd Recipient en matiere plastique multicouche etiree et moulee et procede pour sa preparation
DE3504349A1 (de) * 1984-02-08 1985-08-08 Northern Petrochemical Co., Omaha, Nebr. Biaxial orientierte sauerstoff- und feuchtigkeitsundurchlaessige sperrschicht-folie und verfahren zu ihrer herstellung
EP0207440A2 (en) * 1985-06-26 1987-01-07 Kuraray Co., Ltd. Laminate having good gas barrier properties
EP0309095A1 (en) * 1987-08-24 1989-03-29 E.I. Du Pont De Nemours And Company Barrier blends based on amorphous polyamide and on ethylene/vinyl alcohol copolymer
EP0322891A2 (en) * 1987-12-29 1989-07-05 Kuraray Co., Ltd. Multilayered packaging materials having high gas barrier property

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5677143A (en) * 1979-11-30 1981-06-25 Yoshino Kogyosho Co Ltd Polyethylene terephthalate resin product
JPS57199657A (en) * 1981-06-03 1982-12-07 Toyo Seikan Kaisha Ltd Plastic vessel, oxygen barrier property thereof is improved
JPS59213731A (ja) * 1983-05-18 1984-12-03 Yoshino Kogyosho Co Ltd 熱可塑性ポリエステル製容器の処理方法
JPS602361A (ja) * 1983-06-21 1985-01-08 株式会社クラレ ガス不透過性被覆をもつ予備成形物および二軸延伸複合中空体
JPS60122148A (ja) * 1983-12-05 1985-06-29 東レ株式会社 積層体

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2182164A1 (ja) * 1972-04-28 1973-12-07 Grace W R Ltd
FR2302933A1 (fr) * 1975-03-03 1976-10-01 Toyo Seikan Kaisha Ltd Matiere d'emballage
FR2361223A1 (fr) * 1976-08-10 1978-03-10 Toyo Seikan Kaisha Ltd Recipient en matiere plastique multicouche etiree et moulee et procede pour sa preparation
DE3504349A1 (de) * 1984-02-08 1985-08-08 Northern Petrochemical Co., Omaha, Nebr. Biaxial orientierte sauerstoff- und feuchtigkeitsundurchlaessige sperrschicht-folie und verfahren zu ihrer herstellung
EP0207440A2 (en) * 1985-06-26 1987-01-07 Kuraray Co., Ltd. Laminate having good gas barrier properties
EP0309095A1 (en) * 1987-08-24 1989-03-29 E.I. Du Pont De Nemours And Company Barrier blends based on amorphous polyamide and on ethylene/vinyl alcohol copolymer
EP0322891A2 (en) * 1987-12-29 1989-07-05 Kuraray Co., Ltd. Multilayered packaging materials having high gas barrier property

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0549431A1 (fr) * 1991-12-27 1993-06-30 C.M.B. Flexible Film complexe, notamment destiné à l'emballage de produits alimentaires et le procédé de fabrication
FR2745788A1 (fr) * 1996-03-11 1997-09-12 Oreal Emballages proteges par des supports d'inscription barrieres

Also Published As

Publication number Publication date
NZ235866A (en) 1992-12-23
YU203690A (sh) 1992-12-21
AU642917B2 (en) 1993-11-04
FR2653756A1 (fr) 1991-05-03
AU6479490A (en) 1991-05-09
JPH03183544A (ja) 1991-08-09
HU906969D0 (en) 1991-05-28
FR2653756B1 (fr) 1992-05-15
HUT61928A (en) 1993-03-29
CS535590A3 (en) 1992-02-19
CA2028393A1 (en) 1991-05-01
BR9005508A (pt) 1991-09-17
PL287575A1 (en) 1991-07-15

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